Paper-cutting machine.



No. 673,090. 7 Patented Apr. 30, 190i. C. SEYBOLD.

PAPER CUTTING MACHINE.

(Application tiled in. 1a, 1901. (No Model.)

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.P J a 7 f e Witnesses. v V g fmreizzozt J7me, {w x m q/ 7 UNITED STATESCHARLES SEYBOLD,

PATE T OFFICE.

OF DAYTON, OHIO.

PAPER-"CUTTING MIACHIN E.

SPECIFICATION forming part of Letters Patent no. 673,090, dated April30, 1901.

Application filed January 18, 1901. Serial No- 43,807. 1N0 model.)

To all whom, it may concern.-

Be it known that I, CHARLES SEYBOLD, a citizen of the United States,residing at Dayton, in the county of Montgomery and State of Ohio, haveinvented certain new and useful Improvements in Paper-Cutting Machines,of which the following is a full, clear, and exact description,reference being had to the accompanying drawings, forming part of thisspecification.

My improvements relate to machines for cutting of paper in which aclamp-bar is employed for clamping and holding rigid the paper whilebeing acted on by the cutting-knife;

and it especially relates to that class of machines in which theclamping-bar has been divided lengthwise into two parts, the lowerportion being adapted to be operated by the foot independently of theupper portion, more particularly for the purpose of gaging the paper tobe cut, and in which the upper portion of the clamp is operatedautomatically by the power-operating mechanism of the machine asdistinguished from simple hand-clamp machines.

In the use of an automatic power-clamp in a paper-cutting machine it isof course essential that the clamp shall travel to the paper before theknife begins its operation on the ,pile in order that the pile of papermay be held with absolute rigidity under the stroke of the knife. Asordinarily constructed the clamp must of course be raised with the knifeto allow for the insertion of the pile of paper to be cut thereunder,and in order that the full capacity of the machine may be employed forhigh piles as Well as low. piles of paper the clamp is raised to thefull limit with every stroke, no matter what the size of the pile. Inmodern machines it is desired to give rapid movement to theknife-cutting mechanism, and when the numberof strokes of the knife isincreased per minute the movements of the clamp have to be increasedaccordingly,

and as the clamp has to get to the paper first it is found that in theserapid machines, especially when a comparatively low pile of paper isbeing operated upon, the rapid movement of the clamp displaces thesheets of paper, which ordinarily thus becomes a bar to high-speedcapacityin the machine. It is to overcome this difliculty that myinvention is directed, and the invention relates solely to a certainnovel construction and operation of the clamp under which foreither highor low piles of paper both the clamp and cuttingknife can be operated athigh speed andunder which construction also the clamp may be operatedwith much higher power.

In the drawings, Figure 1 is a rear elevation of the upper portion of apaper-cutting machine, showing my improved clamp. Fig. 2 is a sideelevation of the same with the sectional piece out of operation. Fig. 3is a similar side elevation with the sectional piece in operation.

In the drawings I have not illustrated any thing more of thepaper-cutting machine than is necessary to explain my invention, whichportion of'the clamp to which the clamp-pulling bars are attached, theknife and clamp being operated by power, the working mechanism for whichis placed under the table.

H is the lower half of this ordinary clamp, which is normally held upagainst the upper half of the clamp F by suitable weights or springs,but arranged to descend with the powerclamp F and also to be operated asa gage by the foot-treadle. Rigidly attached to the rear face of thepower-clamp F are two studs or pins a b, and upon these pins is hung anadditional section of the clamp L, sleeves c (1 being securely bolted tothis section L, the sleeves being mounted on the pins. One of these pins(1 is made very much longer than the other and carries a collar 6 on itsouter end, between which collar and the outer face of the sleeve d,which is made much longer than the other sleeve, a coiled spring f ismounted, so as normally to press the section L of the clamp against theface of the lower section II. Now when a high pile of paper is placedunder the clamp the clamp operates in its usual way, and as the pile ofpaper is high the clamp only has to move a very short distance before itreaches the paper, and consequently its speed can be regulated so as notto disturb the paper in the high pile even with high speed for thecutting-knife. When a low pile of paper is placed under the clamp, theoperator lowering the lower section by the treadle leaves an open spacebetween the upper section F and the lower section H, and as soon as thisspace becomes wide enough the coiled spring F forces this intermediatesection L between the other two sections, and the clamp is thus extendedto bear the same relation to the low pile that it did with the high pilewithout the intermediate section.

Mounted on a suitable stud on top of the machine is a hand-lever M,carrying the arm N. This arm is bifurcated at its outer end at h andembraces the pin P, mounted vertically on the sleeve d. As the clampdescends the pin merely slid es down in the bifurcations in the arm N,and in order to throw out the intermediate section as the clamp israised the hand-lever M is shifted to throw out the arm N, and thusremove the intermediate section L and allow the ordinary spring orweight to bring the lower section H of the clamp into its normalposition in contact with the power-section F. The intermediate section Lis preferably lightened in weight as much as possible consistent withthe requisite strength, and the thickness of this section of coursedepends on the proportions of the machine and the ordinary height of thepiles that are to be operated on.

Inasmuch as with my improved construction of clamp the throw of theclamp is diminished, I am enabled to obtain a much greater leverage formy clamp-pulling bars, as the decrease of the distance through which theclamp is to travel enables me to increase the power correspondingly.

Having thus described my invention, what I claim, and desire to secureby Letters Patent, is

1. In a paper-cutter, the combination, with a power-operated clamphaving an independently-movable lower section, of an intermediatesection, and means for interposing the intermediate section for lowpiles' of paper, substantially as shown and described.

2. In a paper-cutter, the combination, with a power-operated clamphaving an independently-movable lower section, of an intermediatesection mounted on the upper section to slide laterally, and spring toin terpose said intermediate section when the lower section is operatedindependently for low piles of paper, as shown and described.

CHARLES SEYBOLD.

Witnesses:

FRANK H. HERBST, EDMUND LINXWEILER.

